气候变化领域集成服务门户(CCPortal): Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data

CCPortal

DOI	10.1029/2020JC016813
	Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data
	Lago L.S.; Saraceno M.; Piola A.R.; Ruiz-Etcheverry L.A.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	Direct current observations and satellite altimetry data over the northern portion of the Argentine continental shelf are used to produce an 11-month long hourly time series and a 25-year long daily time series of along-shore volume transport, respectively. At time scales longer than 20 days, the temporal variability of the in situ transport is significantly correlated with the transport inferred from satellite altimetry (r = 0.74). The mean in situ along-shore transport is 2.65 ± 0.07 Sv (1 Sv = 106 m3 s−1) to the northeast and presents large variability, with a peak-to-peak range of 16 Sv. The extended satellite transport presents variability at multiple time scales. The annual cycle is the dominant signal, with a maximum during the austral autumn and a minimum during the austral spring. The interannual component of the transport is significantly correlated (r = −0.5) with the Southern Annular Mode (SAM). SAM-induced along-shore wind stress anomalies over the region modulate the cross-shore pressure gradient that, in turn, modulates the along-shore transport variability. This mechanism holds also at synoptic scales, highlighting the dominant role of the wind on the along-shore transport. Satellite altimetry measurements also indicate that the cross-shore pressure gradient generated by the variability of the Malvinas Current affects the along-shore transport only in the outer 30 km of the continental shelf. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Argentine continental shelf; in situ data; satellite altimetry; time series; variability analysis; volume transport
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186504
作者单位	Centro de Investigaciones del Mar y la Atmósfera (CIMA-CONICET/UBA), Buenos Aires, Argentina; Departamento de Ciencias de la Atmósfera y de los Océanos, FCEN, Universidad de Buenos Aires, Buenos Aires, Argentina; Unidad Mixta Internacional-Instituto Franco-Argentino para El Estudio del Clima y Sus Impactos (UMI-IFAECI/CNRS-CONICET-UBA), Buenos Aires, Argentina; Departamento de Oceanografía, Servicio de Hidrografía Naval (SHN), Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Lago L.S.,Saraceno M.,Piola A.R.,et al. Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data[J],2021,126(2).
APA	Lago L.S.,Saraceno M.,Piola A.R.,&Ruiz-Etcheverry L.A..(2021).Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data.Journal of Geophysical Research: Oceans,126(2).
MLA	Lago L.S.,et al."Volume Transport Variability on the Northern Argentine Continental Shelf From In Situ and Satellite Altimetry Data".Journal of Geophysical Research: Oceans 126.2(2021).